Stupid QUESTION but I am clueless! When I candle these BCMxComet all I see is yolk I assume moving around inside. Its so hard to see in these buggers! I got them last Wed eve and he said he thinks they are growing even though the pullets are young. he found the nest and wasnt sure how long they been there but no broody hens around..... So when I candle and I see that round dark spot about a quarter size I assume its the yolk... but how do I know if they are growing since I cant see details? and should the yolk move in the egg when u turn it?